void do_tests()
{
	mapping
	m = ([ 1 : 2, "foo" : 3, this_object() : 5 ]);

	map_delete(m, 1);
	ASSERT(undefinedp(m[1]));
	map_delete(m, (
			{}));
	map_delete(m, "foo");
	ASSERT(undefinedp(m["foo"]));
	map_delete(m, this_object());
	ASSERT(undefinedp(m[this_object()]));
}
